POOR SUBIE DYING

How many miles on your '04? Have you skipped any scheduled maintenance?

Bobby...

My MODding Journal

If the engine is running poorly, the transmission is going to be affected, especially if it's a 4EAT.

Okay, with 140K miles, your timing belt was changed at around 105K & your sparkplugs should have been changed at least twice. If the sparkplug wires weren't changed the last time, they could be failing. Then there's the coil pack, which could be failing, or the connections to it could be corroded.

Just guessing of course, but that should give you some areas to check. :wink:

Bobby...

My MODding Journal

The OP said p303, I'm assuming CEL code P0303 - clylinder 3 Misfire Detected. :smile:

Bobby...

My MODding Journal

Front O2 sensor? Possible & they do start failing before they drop a code. Still, I'd expect to see a P0420 from the rear O2 sensor, if the engine was running way rich. :wink:

Bobby...

My MODding Journal

comegetsome123 said:

Thanks for the reply's guys! To be honest, I don't think the spark plugs have been changed on this car once which is pretty bad I know. Is there anything tips you guys have on replacing spark plugs?

Click to expand...

Here you go. http://www.subaruforester.org/vbulletin/f66/n-spark-plug-replacement-anal-55431/#post615927

A dealership will charge you around a $100 for labor to install the sparkplugs. :wink:

How about the timing belt & associated parts? If you loose the timing belt, you'll most likely be looking at a new engine! :icon_eek:

Bobby...

My MODding Journal